Preston Parker is certain he will come up big Sunday against the Falcons, after coming up so small in the season-opener in Dallas.

Parker dropped three passes, all on third down, in the 27-26 loss.

“I’m just ready to get out there and make the plays I know I can make,’’ Parker told The Post. “I use it as fuel. It’s hard to forget when everybody knows and everybody is trying to see how I feel. Just go out there and use it as fuel and that will put it behind me once I go out and have a good game. I can’t say ‘I got to try harder,’ because I try hard.’’

How sure is Parker that he will redeem himself?

“One hundred percent,’’ he said. “Because that’s just me, I go out there with the same mentality. Nothing will hinder me from going out there and not having confidence.’’
In response to Parker’s drops, Dwayne Harris in practice was given some extra work as a slot receiver, but it appears as if the Giants will stick with Parker.

“Preston had a tough day,’’ offensive coordinator Ben McAdoo said. “We count on him bouncing back. He’s a tough guy, he’s a fighter, he’s a competitor and he’s a pro.

“I think Preston has some grit. He’ll go in there and put his face on people if he has to. He plays at a good speed, we just need some more productivity out of him this week and we trust that he’ll bring it.’’

The Giants dropped five passes in the opener, the most they have dropped in one game since Week 10 in 2008, according to Pro Football Focus.

With Markus Kuhn (knee) out, veteran Cullen Jenkins may get more snaps inside at defensive tackle. Jenkins played the opener coming off a hamstring strain and admitted he was not himself.

“I was watching film of last weekend and I slowed down a little bit, I came back from that hamstring and I still didn’t have that explosion,’’ Jenkins said.

There’s a chance the Giants have some inside information on Kyle Shanahan, the Falcons’ offensive coordinator. Safety Brandon Meriweather was with the Redskins in 2012 and 2013 when Shanahan ran the offense in Washington. Asked if he knows Shanahan’s tendencies, Meriweather smiled and said: “Just a little bit.’’

With TE Daniel Fells (foot) out, undrafted rookie Jerome Cunningham from Southern Connecticut will make his NFL debut as the only other tight end on the roster after Larry Donnell.

At halftime, the Super Bowl XXV championship team will be honored in a 25th anniversary celebration. About 40 players from that 1990 team — including Lawrence Taylor, Carl Banks, Jeff Hostetler and Super Bowl MVP Ottis Anderson — plus coach Bill Parcells, will be on hand at MetLife Stadium.